CN106787286A - A kind of bimodulus reluctance motor - Google Patents

Abstract

The invention proposes a double-mode reluctance motor, which includes a stator core, an outer rotor core, an excitation winding, an armature winding, a stator isolation block and a shaft, and belongs to the technical field of special motors. There are 16 evenly distributed rotor poles on the outer rotor core; the stator core is composed of six fan-shaped cores, each fan-shaped core has two armature stator poles on the fan-shaped edge, and the pole arc mechanical angle of the armature stator pole is 9 degrees . In the present invention, the excitation winding is not energized, and the motor operates in the working mode of the switched reluctance motor to drive or generate electricity; when the excitation winding is energized, the motor operates in the working mode of the electrically excited double salient pole motor to drive or generate electricity. Simultaneously, the technical stator spacer block of the present invention is non-magnetic, so the coupling between each stator core is small; and the motor of the present invention is a centralized winding permanent magnet motor, the magnetic circuit path is short, the copper loss and iron loss are small, and the efficiency is high .

Description

A dual-mode reluctance motor

technical field

The invention relates to a dual-mode reluctance motor, which belongs to the technical field of special motors.

Background technique

Electrically excited doubly salient motors are similar to switched reluctance motors in structure, and they also have a lot in common in terms of torque characteristics. However, there are great differences between electrically excited doubly salient motors and switched reluctance motors in terms of working principle, motor performance, and control methods. Therefore, in order to better adapt to changes in working conditions, the working modes of the two motors can be concentrated on one motor, that is, the dual-mode reluctance motor referred to in this application. According to the change of the working environment, the two working modes can be switched to make the motor work in an efficient and reliable state all the time.

Currently related patents mainly focus on switched reluctance or doubly salient single mode. For example, the authorized invention patent: self-coupling permanent magnet doubly salient motor, patent number: 201210088730.2, a self-coupling permanent magnet doubly salient motor, including stator combination, rotor combination and drive control unit. Patent No. 201110302175.4 invention patent: a switched reluctance motor with multi-directional magnetic field characteristics, providing a switched reluctance motor with multi-directional magnetic field characteristics, including a stator, an intermediate rotor, a left rotor, a right rotor, a shaft ,Cable. Under the premise of the same output rotational speed, the motor with the structure of the invention has lighter weight and smaller volume, thereby better meeting the requirements of low-speed drag occasions.

In addition, the applicant applied for a patent for a dual-mode motor with a structure different from this application in 2014, patent number: 201410538070.2 Invention patent: a dual-mode motor generator, a new coil structure is proposed so that the motor can It operates as a switched reluctance motor, and can also operate as an electrically excited double salient motor. The invention works in the switched reluctance motor mode when driving, and works in the electric excitation double salient motor mode when generating electricity.

The technology disclosed in the present invention proposes that the stator core is composed of six fan-shaped cores, each fan-shaped core has two armature stators on the fan-shaped edge, and the mechanical angle of the armature stator pole arc is 9 degrees; the outer rotor core has 16 A uniformly distributed rotor pole, the pole arc mechanical angle of the rotor pole is 9 degrees. In this application, the excitation winding is not energized, and the motor operates in the working mode of the switched reluctance motor to drive or generate electricity; when the excitation winding is energized, the motor operates in the working mode of the electrically excited double salient pole motor to drive or generate electricity.

Contents of the invention

The technical problem to be solved is to provide a dual-mode reluctance motor with modularized concentrated winding, short magnetic circuit and low failure rate.

In order to realize above function, the technical scheme that the present invention takes is:

A dual-mode reluctance motor, comprising a stator core (2), an outer rotor core (1), an excitation winding (5), an armature winding (3), a stator isolation block (6) and a shaft (4), is characterized in that :

There are 16 evenly distributed rotor poles on the outer rotor core (1), and the mechanical angle of the rotor pole arc is 9 degrees;

The stator core (2) is composed of six fan-shaped cores, each fan-shaped core has two armature stator poles on the fan-shaped edge, and the mechanical angle of the armature stator pole arc is 9 degrees;

There is an excitation stator pole at the middle position of the two armature stator poles, and an excitation winding (5) is wound on the excitation stator pole, and the excitation windings (5) on all sector cores have the same winding direction;

An armature winding (3) is wound on each armature stator pole, and the winding direction of the armature winding (3) on the same fan-shaped core is opposite;

On all sector cores, the armature windings (3) on the clockwise side have the same winding direction and the same winding direction as the field winding (5);

There is a winding slot between the excitation stator pole and the armature stator pole on the fan-shaped core, and the notch mechanical angle of the winding slot is 12 degrees.

A dual-mode reluctance motor as described above is characterized in that: the armature winding (3) along the circumferential direction is divided into A phase, B phase, C phase, U phase, V phase and W phase in turn, a total of six phases Armature winding (3).

A dual-mode reluctance motor as described above, characterized in that:

The excitation winding (5) is not energized, and the dual-mode reluctance motor runs in the working mode of the switched reluctance motor for electric or power generation.

A dual-mode reluctance motor as described above, characterized in that:

The excitation winding (5) is energized, and the dual-mode reluctance motor operates as an electric excitation double salient pole motor in electric or power generation mode.

The beneficial effects of the present invention are:

1. The six-phase windings of the motor are isolated from each other, which can limit the fault to one phase, so as to reduce the negative impact of the fault on other phases and prevent the fault from spreading;

2. The motor of this application can not only operate in electric or power generation in the working mode of the switched reluctance motor, but also can run in electric power or power generation in the working mode of the electrically excited double salient pole motor;

3 The rotor has no excitation winding and works reliably;

4. The total flux linkage is short, the magnetic resistance of the stator core is small, and the iron loss is small;

The 5 windings are all centralized windings with small internal resistance and high efficiency.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a structural schematic diagram of a dual-mode reluctance motor of the present invention. Among them, 1. Outer rotor core, 2. Stator core, 3. Armature winding, 4. Shaft, 5. Excitation winding, 6. Stator isolation block.

Fig. 2 is a six-phase self-inductance diagram of a dual-mode reluctance motor of the present invention.

Fig. 3 is a diagram of a switched reluctance working mode of a dual-mode reluctance motor according to the present invention.

Fig. 4 is a working mode diagram of a double-saliency mode of a dual-mode reluctance motor according to the present invention.

detailed description

The present invention provides a dual-mode reluctance motor. In order to make the technical solution and effect of the present invention clearer and clearer, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

The structural representation of a kind of dual-mode reluctance motor of the present invention as shown in Figure 1, this motor is by stator iron core (2), outer rotor iron core (1), field winding (5), armature winding (3), stator isolating block (6) and shaft (4) form. There are 16 evenly distributed rotor poles on the outer rotor core (1), and the mechanical angle of the rotor pole arc is 9 degrees. The stator core (2) is composed of six fan-shaped cores, each fan-shaped core has two armature stator poles on the fan-shaped edge, and the mechanical angle of the armature stator pole arc is 9 degrees; the middle of the circular arc of each fan-shaped core There is an excitation stator pole at the position, and an excitation winding (5) is wound on the excitation stator pole, and the excitation windings (5) on all sector cores are wound in the same direction; each armature stator pole is wound with an armature winding (3) , the winding direction of the armature winding (3) on the same sector core is opposite; on all sector cores, the winding direction of the armature winding (3) on the clockwise side is the same, and the winding direction of the field winding (5) is the same . There is a winding slot between the excitation stator pole and the armature stator pole on the sector core, and the arc mechanical angle of the winding slot is 12 degrees.

Fig. 2 is a six-phase self-inductance diagram of a dual-mode reluctance motor of the present invention. When the rotor pole is aligned with the phase A stator pole, the self-inductance of phase A is the largest, and the flux linkage of phase A is also the largest; when the rotor is completely separated from the stator pole of phase A, the self-inductance of phase A is the smallest, and the flux linkage of phase A is also the smallest.

Fig. 3 is a diagram of a switched reluctance working mode of a dual-mode reluctance motor according to the present invention. Pass forward current to one phase winding in the rising area of inductance, then the phase will output positive torque. No current is passed to the windings in the inductance drop area and the inductance platform area, and the windings do not output force at this time.

Fig. 4 is a working mode diagram of a double-saliency mode of a dual-mode reluctance motor according to the present invention. Pass forward current to one phase winding in the rising area of inductance, then the phase will output positive torque. A negative current is passed to the winding in the inductance drop area, and at this time, the winding also outputs positive torque to the outside.

The working principle of a dual-mode reluctance motor proposed by the present invention will be described below.

When the motor is working in the state of switched reluctance motor, the motor detects the position of the rotor through the position signal sensor, and the current is passed through the controller in the rising area of the phase winding inductance, and the motor can generate positive torque, which turns to A phase, B phase, When the six-phase armature windings of phase C, U, V and W are energized, the motor can rotate; when the controller feeds current in the area where the inductance of the phase windings drops, the motor will generate negative torque and enter the power generation state. The phase armature windings are externally connected to the load to output electric energy.

When the motor is in double-saliency electric excitation mode, the rotor position of the motor is detected by the position sensor, and the position signal is sent to the controller. The controller controls the corresponding switch tube of the power converter to pass forward current to the winding with the flux linkage rising. , the negative current is applied to the winding where the flux linkage drops, and the motor can realize the external output torque; the excitation current is applied to the excitation winding, and the armature winding is not energized. When the rotor rotates past the stator pole where the armature winding is located, the magnetic field The chain will change with the rotation of the rotor, an electromotive force will be induced in the armature winding, and the external load can output electric energy.

It can be understood that those skilled in the art can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention, and all these changes or replacements should belong to the protection scope of the appended claims of the present invention.

Claims (4)

1. a dual-mode reluctance motor, comprising stator iron core (2), outer rotor iron core (1), field winding (5), armature winding (3), stator spacer block (6) and shaft (4), its Characterized by: There are 16 evenly distributed rotor poles on the outer rotor core (1), and the mechanical angle of the rotor pole arc is 9 degrees; The stator core (2) is composed of six fan-shaped cores, each fan-shaped core has two armature stator poles on the fan-shaped edge, and the mechanical angle of the armature stator pole arc is 9 degrees; There is an excitation stator pole at the middle position of the two armature stator poles, and an excitation winding (5) is wound on the excitation stator pole, and the excitation windings (5) on all sector cores have the same winding direction; An armature winding (3) is wound on each armature stator pole, and the winding direction of the armature winding (3) on the same fan-shaped core is opposite; On all sector cores, the armature windings (3) on the clockwise side have the same winding direction and the same winding direction as the field winding (5); There is a winding slot between the excitation stator pole and the armature stator pole on the fan-shaped core, and the notch mechanical angle of the winding slot is 12 degrees. 2. A kind of dual-mode reluctance motor as claimed in claim 1, characterized in that: the armature winding (3) along the circumferential direction is divided into A phase, B phase, C phase, U phase, V phase and W phase, a total of six phase armature windings (3). 3. A kind of dual-mode reluctance motor as claimed in claim 1, characterized in that: The excitation winding (5) is not energized, and the dual-mode reluctance motor runs in the working mode of the switched reluctance motor for electric or power generation. 4. A kind of dual-mode reluctance motor as claimed in claim 1, characterized in that: The excitation winding (5) is energized, and the dual-mode reluctance motor operates as an electric excitation double salient pole motor in electric or power generation mode.